Solute concentration contour plots have default logarithmic scales of 0 to >50,000 ng/L, 0 to >5000 ug/L or 0 to > 500 mg/L, dependent on the units selected. The concentration scale is fixed so that contour plots for successive time slices are directly comparable. The user can, however, select to “scale colours to data” to produce a colour key scaled to the concentration range for each model output interval.
